THESE ARE FOR COLLECTING ONLY, DO NOT FIRE THESE! The Tri-Test Super Sonic Shur-Kil shotgun shells are a very interesting experimental all plastic cased 12 gauge load that was apparently supposed to be reloadable time and time again (turns out it wasn't). The plastic cases have become brittle with age and are not suitable for firing out of any shotgun! A very neat piece to put on your shelf with your collection!